Abstract
Van Poolen L.J., Niesen V.G. and Rainwater J.C., 1991. Experimental method for obtaining critical densities of binary mixtures: application to ethane + n-butane. Fluid Phase Equilibria, 66: 161-185. According to the experimental and analytical procedure proposed by Van Poolen and Rainwater, rectilinear diameters based on measured vapor-liquid coexistence densities along a path of constant overall density and composition have been determined and used to obtain critical densities of the binary mixture ethane+ n-butane. Seven experimental runs for the mixture were made at compositions ranging from, 21.65 to 80.75 mol% ethane. The procedure has been explored as a new way to determine critical densities of mixtures. Results are compared with densities generated from a modified Leung-Griffiths correlation of the extensive vapor-liquid equilibrium data of Kay. The critical densities obtained are in agreement with the correlation within the overall uncertainty of the method, thereby verifying the proposed technique.
Published Version
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